amd_iommu_enable_interrupts() called in amd_iommu_resume().
Signed-off-by: NGerard Snitselaar <dev@snitselaar.org>
Signed-off-by: NJoerg Roedel <joro@8bytes.org>

For interrupt remapping the enablement of the IOMMU MSI
interrupt needs to be deferred because the IOMMU itself will
be initialized before the io-apics are up and running. So
the code to setup the MSI is moved seperated from the
hardware-setup routine now.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Unfortunatly the interrupts for the event log and the
peripheral page-faults are only enabled at boot but not
re-enabled at resume. Fix that.

Cc: stable@vger.kernel.org
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Fix the following section warning in drivers/iommu/amd_iommu.c :

WARNING: vmlinux.o(.text+0x526e77): Section mismatch in reference from the function prealloc_protection_domains() to the function .init.text:alloc_passthrough_domain()
The function prealloc_protection_domains() references
the function __init alloc_passthrough_domain().
This is often because prealloc_protection_domains lacks a __init
annotation or the annotation of alloc_passthrough_domain is wrong.

Cc: stable@vger.kernel.org
Signed-off-by: NSteffen Persvold <sp@numascale.com>
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Add a check to the init-path of the AMD IOMMUv2 driver if
the hardware is available in the system. Only allocate all
the resources if it is really available.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

When ioremap_nocache fails in iommu initialization the code
calls release_mem_region immediatly. But the function is
called again when the propagates into the upper init
functions leading to a double-free. Fix that.
Reported-by: NDon Dutile <ddutile@redhat.com>
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

The hardware-initializtion part of the AMD IOMMU driver is
split out into a seperate function. This function can now be
called either from amd_iommu_init() itself or any other
place if the hardware needs to be ready earlier. This will
be used to implement interrupt remapping for AMD.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Error handling in msm_iommu_unmap() is broken. On some error
conditions retval is set to a non-zero value which causes
the function to return 'len' at the end. This hides the
error from the user. Zero should be returned in those error
cases.

Cc: David Brown <davidb@codeaurora.org>
Cc: Stepan Moskovchenko <stepanm@codeaurora.org>
Cc: stable@vger.kernel.org # >= 3.1
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>
Acked-by: NDavid Brown <davidb@codeaurora.org>

On some systems the IVRS table does not contain all PCI
devices present in the system. In case a device not present
in the IVRS table is translated by the IOMMU no DMA is
possible from that device by default.
This patch fixes this by removing the DTE entry for every
PCI device present in the system and not covered by IVRS.

Cc: stable@vger.kernel.org # >= 3.0
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

To protect the command buffer from hanging when a device
does not respond to an IOTLB invalidation, set a timeout of
1s for outstanding IOTLB invalidations.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

The IOMMUv2 driver added a few statistic counter which are
interesting in the iommu=pt mode too. So initialize the
statistic counter for that mode too.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

The caches are already flushed in enable_iommus(), so this
flush is not necessary.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

In i915 driver, we do not enable either rc6 or semaphores on SNB when dmar
is enabled. The new 'intel_iommu_enabled' variable signals when the
iommu code is in operation.

Cc: Ted Phelps <phelps@gnusto.com>
Cc: Peter <pab1612@gmail.com>
Cc: Lukas Hejtmanek <xhejtman@fi.muni.cz>
Cc: Andrew Lutomirski <luto@mit.edu>
CC: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Eugeni Dodonov <eugeni.dodonov@intel.com>
Signed-off-by: NKeith Packard <keithp@keithp.com>

Since it is not guaranteed that an iommu driver initializes in its
domain_init() function, it must be initialized with NULL to prevent
calling a function in an arbitrary location when iommu fault occurred.
Signed-off-by: NKyongHo Cho <pullip.cho@samsung.com>
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

This call-back is invoked when the task that is bound to a
pasid is about to exit. The driver can use it to shutdown
all context related to that context in a safe way.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

This function can be used to find out which features
necessary for IOMMUv2 usage are available on a given device.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

The symbolic register names for PCI and PASID changed in
PCI code. This patch adapts the AMD IOMMU driver to these
changes.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

This callback can be used to change the PRI response code
sent to a device when a PPR fault fails.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Since pages are not pinned anymore we need notifications
when the VMM changes the page-tables. Use mmu_notifiers for
that.
Also use the task_exit notifier from the profiling subsystem
to shutdown all contexts related to this task.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Register the notifier for PPR faults and handle them as
necessary.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

This patch adds routines to bind a specific process
address-space to a given PASID.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

This patch adds the amd_iommu_init_device() and
amd_iommu_free_device() functions which make a device and
the IOMMU ready for IOMMUv2 usage.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Add a Kconfig option for the optional driver. Since it is
optional it can be compiled as a module and will only be
loaded when required by another driver.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Add some interesting statistic counters for events when
IOMMUv2 is active.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Add infrastructure for errata-handling and handle two known
erratas in the IOMMUv2 code.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

The AMD IOMMUv2 driver needs to get the IOMMUv2 domain
associated with a particular device. This patch adds a
function to get this information.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

To send completions for PPR requests this patch adds a
function which can be used by the IOMMUv2 driver.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

This patch adds functions necessary to set and clear the
GCR3 values associated with a particular PASID in an IOMMUv2
domain.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

The functions added with this patch allow to manage the
IOMMU and the device TLBs for all devices in an IOMMUv2
domain.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

This patch adds support for protection domains that
implement two-level paging for devices.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

This function can be used to switch a domain into
paging-mode 0. In this mode all devices can access physical
system memory directly without any remapping.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Add a notifer at which a module can attach to get informed
about incoming PPR faults.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

If the device starts to use IOMMUv2 features the dma handles
need to stay valid. The only sane way to do this is to use a
identity mapping for the device and not translate it by the
iommu. This is implemented with this patch. Since this lifts
the device-isolation there is also a new kernel parameter
which allows to disable that feature.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

In mixed IOMMU setups this flag inidicates whether an IOMMU
supports the v2 features or not. This patch also adds a
global flag together with a function to query that flag from
other code. The flag shows if at least one IOMMUv2 is in the
system.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

This feature needs to be enabled before IOMMUv2 DTEs can be
set up.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Allocate and enable a log buffer for peripheral page faults
when the IOMMU supports this feature.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Read the number of PASIDs supported by each IOMMU in the
system and take the smallest number as the maximum value
supported by the IOMMU driver.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Convert the contents of 'struct dev_table_entry' to u64 to
allow updating the DTE wit 64bit writes as required by the
spec.
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>

Now all ARCH_POPULATES_NODE_MAP archs select HAVE_MEBLOCK_NODE_MAP -
there's no user of early_node_map[] left.  Kill early_node_map[] and
replace ARCH_POPULATES_NODE_MAP with HAVE_MEMBLOCK_NODE_MAP.  Also,
relocate for_each_mem_pfn_range() and helper from mm.h to memblock.h
as page_alloc.c would no longer host an alternative implementation.

This change is ultimately one to one mapping and shouldn't cause any
observable difference; however, after the recent changes, there are
some functions which now would fit memblock.c better than page_alloc.c
and dependency on HAVE_MEMBLOCK_NODE_MAP instead of HAVE_MEMBLOCK
doesn't make much sense on some of them.  Further cleanups for
functions inside HAVE_MEMBLOCK_NODE_MAP in mm.h would be nice.

-v2: Fix compile bug introduced by mis-spelling
 CONFIG_HAVE_MEMBLOCK_NODE_MAP to CONFIG_MEMBLOCK_HAVE_NODE_MAP in
 mmzone.h.  Reported by Stephen Rothwell.
Signed-off-by: NTejun Heo <tj@kernel.org>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Chen Liqin <liqin.chen@sunplusct.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: "H. Peter Anvin" <hpa@zytor.com>

An omap_iommu_iova_to_phys failure usually means that iova wasn't mapped.

When that happens, it's helpful to know the value of iova, so add it
to the error message.
Signed-off-by: NOhad Ben-Cohen <ohad@wizery.com>
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>